已知x+2y-3z=0,3x-4y-19z=0,求z分之x+y
来源:学生作业帮助网 编辑:六六作业网 时间:2025/01/07 23:42:12
已知x+2y-3z=0,3x-4y-19z=0,求z分之x+y已知x+2y-3z=0,3x-4y-19z=0,求z分之x+y已知x+2y-3z=0,3x-4y-19z=0,求z分之x+yx+2y-3z
已知x+2y-3z=0,3x-4y-19z=0,求z分之x+y
已知x+2y-3z=0,3x-4y-19z=0,求z分之x+y
已知x+2y-3z=0,3x-4y-19z=0,求z分之x+y
x+2y-3z=0,①
3x-4y-19z=0,②
由2×①+②得
5x-25z=0 →x=5z
将x=5z代入①得
5z+2y-3z=0
2y+2z=0 →y=-z
所以z分之x+y=(5z-z)/z=4z/z=4
祝学习快乐!
4
已知{x-3y+2z=0 3x-3y-4z+0,则x:y:z=?
已知x-2y+3z=0,x-3y+4z=0,则x:y:z=
已知2x-y-z=0,3x+4y-2z=0,则x:y:z=?
已知x+4y-3z=0,4x-5y+2z=0,则x:y:z
已知{x-5y+2z=0 3x-5y-4z=0,求x:y:z
已知方程组4x-5y+2z=0 x+2y=3z 则x:y:z
已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX..
已知x,y,z 大于0,x+y+z=2,求证 xz/y(y+z)+zy/x(x+y)+yx/z(z+x)大于等于2/3
已知:2X-3y+2z=0,x+4Y-9/2z=0求:X:Z的值.X:y:Z的值.X+2y+X/X+y+Z的值. 已知:2X
已知:4x-5y+2z=0 x+4y-3z=0则:(x*x+y*y+z*z)/(x*y+y*z+z*x)=____.
已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z
已知4X-3y-3z=0 X-3y-Z=0求3X-2Z+Y/-x+y+Z的值
已知4X-3Y-3Z=0和X-3Y-Z=0 求3x-2z+y:-x+y+z的值
已知x+2y-4z=0,3x-y-z=0,则3x+2y+z/x+2y+z=
已知4x-3y-6z=0,x+2y-7z=0,求5x+2y-z/2x-3y-10z
已知x+4y+3z=3x-2y-5z=0,求x+2y-z/2x-3y+7z的值
已知3x+4y+5z=0,2x+3y-4z=0,求(x+y+z)/(x-y+z)
已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/(除以)x-y+z的值.